Smoke performance problems...

Im using the "Example Vehicles" scripts as groundwork for my physics but whenever I try to use the smoke-effects i get a serious performance drop.
I go from 100fps to about 25-30!

Heres the code involved

Code (csharp):

1.  
2. // This is in FixedUpdate
3.  
4. for(w in wheels)
5.     {      
6.         //rotate wheel
7.         w.rotation += wheelRPM / 60.0 * 360.0* Time.fixedDeltaTime;
8.         w.rotation = Mathf.Repeat(w.rotation, 360.0);      
9.         w.graphic.localRotation= Quaternion.Euler( w.rotation, w.maxSteerAngle*steer, 0.0 ) * w.originalRotation;
10.  
11.         //check if wheel is on ground
12.         if(w.coll.isGrounded)
13.             onGround=true;
14.        
15.         var hit : WheelHit;
16.         var c : WheelCollider;
17.         c = w.coll;
18.         if(c.GetGroundHit(hit))
19.         {
20.             //if the wheel touches the ground, adjust graphical wheel position to reflect springs
21.             w.graphic.localPosition.y-=Vector3.Dot(w.graphic.position-hit.point,transform.up)-w.coll.radius;
22.            
23.             //create dust on ground if appropiate
24.             if(rigidbody.velocity.x > 5)
25.             {
26.                 groundDustEffect.position=hit.point;
27.                 groundDustEffect.particleEmitter.worldVelocity=rigidbody.velocity*0.5;
28.                 groundDustEffect.particleEmitter.minEmission=1;
29.                 groundDustEffect.particleEmitter.maxEmission=1.5;
30.                 groundDustEffect.particleEmitter.Emit();                               
31.             }
32.         }
33.  
34.     }
35.  

Anyone have any tips&tricks to save some performance here?

Best Regards

 

What's the hardware? If low-end, maybe fewer particles would help?

 

Thats the problem...
Im using the new iMac 24" with 2.8GHz and 2 Gb memory

Just a basic terrain and a car

 

Well, I measure it in editor yes...
But the game starts to stutter, a lot! So I dont think its just because of the fps counter...

 

Ok, tried a standalone build and its not much better...

Get 280+ fps without smoke and around 40 with the smoke turned on
Something is really not right here...

Any ideas? Anyone using particleeffects in a cargame who can point me in the right direction??

 

Can you post a web-player. We might be able to spot the problem offhand.

d.

 

Ok, here goes

http://www.frikkinsoft.eu/Unity/Jeeping.html
In the webplayer I could only see the difference when going fullscreen though...
Wierd...

 

just jumping in here - are you using the jeep from the vehicles example? that thing is not realtime friendly - way too many materials polys if i recall - i'd definitly use a different vehicle model if that's the case ; )

 

I have a "old" iMac 24'' 2,16 GHz and I get 80-160 fps in full screen

 

On a C2D MacBook Pro I get ~100 FPS avg.